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Journal of Thermal Analysis and Calorimetry

, Volume 80, Issue 3, pp 579–583 | Cite as

Thermal properties of the magnetic RuSr2GdCu2O8 superconductor

  • G. A. Costa
  • A. Ubaldini
  • C. Artini
  • M. M. Carnasciali
  • R. Masini
Article

Summary

A thermal study was performed on the RuSr2GdCu2O8 (Ru-1212) magnetic superconductor phase to investigate the effect of the annealing treatments in flowing O2 on the stability limit of the phase and on its structural, magnetic and transport properties. DTA-TG measurements were utilized to determine the decomposition process and the dependence of the decomposition temperature on the annealing atmosphere. The decomposition of the Ru-1212 phase was found sensitive to the oxygen partial pressure and increases with PO2 and the annealing time. The annealing treatments exert a depressing effect on the strength of the magnetic interaction, an enhancement on the superconductive properties and the vanishing of the magnetostriction. A decomposition reaction of Ru-1212 phase was proposed and discussed.

EGA DTA-TG superconductivity phase stability ruthenates 

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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2005

Authors and Affiliations

  • G. A. Costa
    • 1
  • A. Ubaldini
    • 2
  • C. Artini
    • 3
  • M. M. Carnasciali
    • 4
  • R. Masini
    • 5
  1. 1.INFM (LAMIA) and DCCI, Universitá di Genova
  2. 2.INFM (LAMIA) and DCCI, Universitá di Genova
  3. 3.INFM (LAMIA) and DCCI, Universitá di Genova
  4. 4.INSTM and DCCI, Universitá di Genova
  5. 5.CNR-IMEM, Sezione di Genova

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